5 mu 6 chia 5 mu 3 cong 3 mu 2 3 mu3 tru 3 mu 4 nhan 3
5 mu 6 chia 5 mu 3 cong 3 mu 2 3 mu3 tru 3 mu 4 nhan 3
3 mu 3 nhan 9 tru 3 mu 4 nhan 3 cong 5 mu 8 nhan 5 mu 0 tru 5 mu 12 chia 25 mu 2
7 nhan 6 mũ 10 nhan 2 mu 20 nhan 3 mu 6-2 mu 19 nhan 6 mu 15 phần 9 nhân 6 mu 19 nhan 2 mu 9 -4 nhan 3 mu 17 nhan 2 mu 26
8 mu 2 chia 9 cong 50 chia 2 tru ba mu ba nhan 3 mu 0
(tinh nhanh neu co the)
6 mu 5 nhan 2 mu 7 tren 3 mu 4 nhan 2 mu 10
bai 2, viet gon duoi dang 1 luy thua ;
a, 3 mu 6 nhan 3 mu 8 b, 2 mu 7 nhan 2 mu 11 c 5 mu 4 nhan 5 mu 6 d,16 nhan 2 mu 5
e, 3 mu 7 nhan 2 mu 7 f, 25 nhan 5 mu 7 nhan 125 g, 27 nhan 3 mu 4 nhan 9 h, 64 nhan 8 nhan 2 mu5
giup minh voi thu 6 la minh can roi ai nhanh minh nhan like
chung minh rang 8 mu 10 cong 2 mu 20 chia het cho 41
chung minh rang 313 mu 6 nhan 36 tru 313 mu 5 nhan 299 chia het cho 7
bai 1, tinh ;
a, 3 mu 5 b, 2 mu 6 c, 2 mu 3 nhan 3 mu 2 d, 4 mu 3 nhan 5 mu 2
75 : { 250 - [ 175 + ( 2 mu 3 nhan 5 mu 2 - 6 nhan 25 ) ]}
[2 mu 17 + 17 mu 2 ] nhan [9 mu 15 - 3 mu 15] nhan [ 2 mu 4-4 mu 2]